1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1994-1996 Søren Schmidt 5 * Copyright (c) 2018 Turing Robotic Industries Inc. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #define __ELF_WORD_SIZE 64 30 31 #include <sys/param.h> 32 #include <sys/elf.h> 33 #include <sys/exec.h> 34 #include <sys/imgact.h> 35 #include <sys/imgact_elf.h> 36 #include <sys/kernel.h> 37 #include <sys/ktr.h> 38 #include <sys/lock.h> 39 #include <sys/module.h> 40 #include <sys/mutex.h> 41 #include <sys/proc.h> 42 #include <sys/stddef.h> 43 #include <sys/syscallsubr.h> 44 #include <sys/sysctl.h> 45 #include <sys/sysent.h> 46 47 #include <vm/pmap.h> 48 #include <vm/vm.h> 49 #include <vm/vm_map.h> 50 #include <vm/vm_page.h> 51 52 #include <arm64/linux/linux.h> 53 #include <arm64/linux/linux_proto.h> 54 #include <compat/linux/linux_dtrace.h> 55 #include <compat/linux/linux_elf.h> 56 #include <compat/linux/linux_emul.h> 57 #include <compat/linux/linux_fork.h> 58 #include <compat/linux/linux_ioctl.h> 59 #include <compat/linux/linux_mib.h> 60 #include <compat/linux/linux_misc.h> 61 #include <compat/linux/linux_signal.h> 62 #include <compat/linux/linux_util.h> 63 #include <compat/linux/linux_vdso.h> 64 65 #include <arm64/linux/linux_sigframe.h> 66 67 #include <machine/md_var.h> 68 #include <machine/pcb.h> 69 #ifdef VFP 70 #include <machine/vfp.h> 71 #endif 72 73 MODULE_VERSION(linux64elf, 1); 74 75 #define LINUX_VDSOPAGE_SIZE PAGE_SIZE * 2 76 #define LINUX_VDSOPAGE (VM_MAXUSER_ADDRESS - \ 77 LINUX_VDSOPAGE_SIZE) 78 #define LINUX_SHAREDPAGE (LINUX_VDSOPAGE - PAGE_SIZE) 79 /* 80 * PAGE_SIZE - the size 81 * of the native SHAREDPAGE 82 */ 83 #define LINUX_USRSTACK LINUX_SHAREDPAGE 84 #define LINUX_PS_STRINGS (LINUX_USRSTACK - \ 85 sizeof(struct ps_strings)) 86 87 static int linux_szsigcode; 88 static vm_object_t linux_vdso_obj; 89 static char *linux_vdso_mapping; 90 extern char _binary_linux_vdso_so_o_start; 91 extern char _binary_linux_vdso_so_o_end; 92 static vm_offset_t linux_vdso_base; 93 94 extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL]; 95 extern const char *linux_syscallnames[]; 96 97 SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler); 98 99 static void linux_vdso_install(const void *param); 100 static void linux_vdso_deinstall(const void *param); 101 static void linux_vdso_reloc(char *mapping, Elf_Addr offset); 102 static void linux_set_syscall_retval(struct thread *td, int error); 103 static int linux_fetch_syscall_args(struct thread *td); 104 static void linux_exec_setregs(struct thread *td, struct image_params *imgp, 105 uintptr_t stack); 106 static void linux_exec_sysvec_init(void *param); 107 static int linux_on_exec_vmspace(struct proc *p, 108 struct image_params *imgp); 109 110 /* DTrace init */ 111 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE); 112 113 /* DTrace probes */ 114 LIN_SDT_PROBE_DEFINE0(sysvec, linux_exec_setregs, todo); 115 116 LINUX_VDSO_SYM_CHAR(linux_platform); 117 LINUX_VDSO_SYM_INTPTR(kern_timekeep_base); 118 LINUX_VDSO_SYM_INTPTR(__user_rt_sigreturn); 119 120 static int 121 linux_fetch_syscall_args(struct thread *td) 122 { 123 struct proc *p; 124 struct syscall_args *sa; 125 register_t *ap; 126 127 p = td->td_proc; 128 ap = td->td_frame->tf_x; 129 sa = &td->td_sa; 130 131 sa->code = td->td_frame->tf_x[8]; 132 sa->original_code = sa->code; 133 /* LINUXTODO: generic syscall? */ 134 if (sa->code >= p->p_sysent->sv_size) 135 sa->callp = &p->p_sysent->sv_table[0]; 136 else 137 sa->callp = &p->p_sysent->sv_table[sa->code]; 138 139 if (sa->callp->sy_narg > nitems(sa->args)) 140 panic("ARM64TODO: Could we have more than %zu args?", 141 nitems(sa->args)); 142 memcpy(sa->args, ap, nitems(sa->args) * sizeof(register_t)); 143 144 td->td_retval[0] = 0; 145 return (0); 146 } 147 148 static void 149 linux_set_syscall_retval(struct thread *td, int error) 150 { 151 152 td->td_retval[1] = td->td_frame->tf_x[1]; 153 cpu_set_syscall_retval(td, error); 154 155 if (__predict_false(error != 0)) { 156 if (error != ERESTART && error != EJUSTRETURN) 157 td->td_frame->tf_x[0] = bsd_to_linux_errno(error); 158 } 159 } 160 161 void 162 linux64_arch_copyout_auxargs(struct image_params *imgp, Elf_Auxinfo **pos) 163 { 164 165 AUXARGS_ENTRY((*pos), LINUX_AT_SYSINFO_EHDR, linux_vdso_base); 166 AUXARGS_ENTRY((*pos), LINUX_AT_HWCAP, *imgp->sysent->sv_hwcap); 167 AUXARGS_ENTRY((*pos), LINUX_AT_HWCAP2, *imgp->sysent->sv_hwcap2); 168 AUXARGS_ENTRY((*pos), LINUX_AT_PLATFORM, PTROUT(linux_platform)); 169 } 170 171 /* 172 * Reset registers to default values on exec. 173 */ 174 static void 175 linux_exec_setregs(struct thread *td, struct image_params *imgp, 176 uintptr_t stack) 177 { 178 struct trapframe *regs = td->td_frame; 179 struct pcb *pcb = td->td_pcb; 180 181 /* LINUXTODO: validate */ 182 LIN_SDT_PROBE0(sysvec, linux_exec_setregs, todo); 183 184 memset(regs, 0, sizeof(*regs)); 185 /* glibc start.S registers function pointer in x0 with atexit. */ 186 regs->tf_sp = stack; 187 #if 0 /* LINUXTODO: See if this is used. */ 188 regs->tf_lr = imgp->entry_addr; 189 #else 190 regs->tf_lr = 0xffffffffffffffff; 191 #endif 192 regs->tf_elr = imgp->entry_addr; 193 194 pcb->pcb_tpidr_el0 = 0; 195 pcb->pcb_tpidrro_el0 = 0; 196 WRITE_SPECIALREG(tpidrro_el0, 0); 197 WRITE_SPECIALREG(tpidr_el0, 0); 198 199 #ifdef VFP 200 vfp_reset_state(td, pcb); 201 #endif 202 203 /* 204 * Clear debug register state. It is not applicable to the new process. 205 */ 206 bzero(&pcb->pcb_dbg_regs, sizeof(pcb->pcb_dbg_regs)); 207 } 208 209 int 210 linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args) 211 { 212 struct l_sigframe *frame; 213 ucontext_t uc; 214 struct trapframe *tf; 215 int error; 216 217 tf = td->td_frame; 218 frame = (struct l_sigframe *)tf->tf_sp; 219 220 if (copyin((void *)&frame->uc, &uc, sizeof(uc))) 221 return (EFAULT); 222 223 error = set_mcontext(td, &uc.uc_mcontext); 224 if (error != 0) 225 return (error); 226 227 /* Restore signal mask. */ 228 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); 229 230 return (EJUSTRETURN); 231 } 232 233 static void 234 linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 235 { 236 struct thread *td; 237 struct proc *p; 238 struct trapframe *tf; 239 struct l_sigframe *fp, *frame; 240 struct l_fpsimd_context *fpsimd; 241 struct l_esr_context *esr; 242 l_stack_t uc_stack; 243 ucontext_t uc; 244 uint8_t *scr; 245 struct sigacts *psp; 246 int onstack, sig, issiginfo; 247 248 td = curthread; 249 p = td->td_proc; 250 PROC_LOCK_ASSERT(p, MA_OWNED); 251 252 sig = ksi->ksi_signo; 253 psp = p->p_sigacts; 254 mtx_assert(&psp->ps_mtx, MA_OWNED); 255 256 tf = td->td_frame; 257 onstack = sigonstack(tf->tf_sp); 258 issiginfo = SIGISMEMBER(psp->ps_siginfo, sig); 259 260 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 261 catcher, sig); 262 263 /* Allocate and validate space for the signal handler context. */ 264 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack && 265 SIGISMEMBER(psp->ps_sigonstack, sig)) { 266 fp = (struct l_sigframe *)((uintptr_t)td->td_sigstk.ss_sp + 267 td->td_sigstk.ss_size); 268 #if defined(COMPAT_43) 269 td->td_sigstk.ss_flags |= SS_ONSTACK; 270 #endif 271 } else { 272 fp = (struct l_sigframe *)td->td_frame->tf_sp; 273 } 274 275 /* Make room, keeping the stack aligned */ 276 fp--; 277 fp = (struct l_sigframe *)STACKALIGN(fp); 278 279 get_mcontext(td, &uc.uc_mcontext, 0); 280 uc.uc_sigmask = *mask; 281 282 uc_stack.ss_sp = PTROUT(td->td_sigstk.ss_sp); 283 uc_stack.ss_size = td->td_sigstk.ss_size; 284 uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) != 0 ? 285 (onstack ? LINUX_SS_ONSTACK : 0) : LINUX_SS_DISABLE; 286 mtx_unlock(&psp->ps_mtx); 287 PROC_UNLOCK(td->td_proc); 288 289 /* Fill in the frame to copy out */ 290 frame = malloc(sizeof(*frame), M_LINUX, M_WAITOK | M_ZERO); 291 292 memcpy(&frame->sf.sf_uc.uc_sc.regs, tf->tf_x, sizeof(tf->tf_x)); 293 frame->sf.sf_uc.uc_sc.regs[30] = tf->tf_lr; 294 frame->sf.sf_uc.uc_sc.sp = tf->tf_sp; 295 frame->sf.sf_uc.uc_sc.pc = tf->tf_elr; 296 frame->sf.sf_uc.uc_sc.pstate = tf->tf_spsr; 297 frame->sf.sf_uc.uc_sc.fault_address = (register_t)ksi->ksi_addr; 298 299 /* Stack frame for unwinding */ 300 frame->fp = tf->tf_x[29]; 301 frame->lr = tf->tf_elr; 302 303 /* Translate the signal. */ 304 sig = bsd_to_linux_signal(sig); 305 siginfo_to_lsiginfo(&ksi->ksi_info, &frame->sf.sf_si, sig); 306 bsd_to_linux_sigset(mask, &frame->sf.sf_uc.uc_sigmask); 307 308 /* 309 * Prepare fpsimd & esr. Does not check sizes, as 310 * __reserved is big enougth. 311 */ 312 scr = (uint8_t *)&frame->sf.sf_uc.uc_sc.__reserved; 313 #ifdef VFP 314 fpsimd = (struct l_fpsimd_context *) scr; 315 fpsimd->head.magic = L_FPSIMD_MAGIC; 316 fpsimd->head.size = sizeof(struct l_fpsimd_context); 317 fpsimd->fpsr = uc.uc_mcontext.mc_fpregs.fp_sr; 318 fpsimd->fpcr = uc.uc_mcontext.mc_fpregs.fp_cr; 319 320 memcpy(fpsimd->vregs, &uc.uc_mcontext.mc_fpregs.fp_q, 321 sizeof(uc.uc_mcontext.mc_fpregs.fp_q)); 322 scr += roundup(sizeof(struct l_fpsimd_context), 16); 323 #endif 324 if (ksi->ksi_addr != 0) { 325 esr = (struct l_esr_context *) scr; 326 esr->head.magic = L_ESR_MAGIC; 327 esr->head.size = sizeof(struct l_esr_context); 328 esr->esr = tf->tf_esr; 329 } 330 331 memcpy(&frame->sf.sf_uc.uc_stack, &uc_stack, sizeof(uc_stack)); 332 memcpy(&frame->uc, &uc, sizeof(uc)); 333 334 /* Copy the sigframe out to the user's stack. */ 335 if (copyout(frame, fp, sizeof(*fp)) != 0) { 336 /* Process has trashed its stack. Kill it. */ 337 free(frame, M_LINUX); 338 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp); 339 PROC_LOCK(p); 340 sigexit(td, SIGILL); 341 } 342 free(frame, M_LINUX); 343 344 tf->tf_x[0]= sig; 345 if (issiginfo) { 346 tf->tf_x[1] = (register_t)&fp->sf.sf_si; 347 tf->tf_x[2] = (register_t)&fp->sf.sf_uc; 348 } else { 349 tf->tf_x[1] = 0; 350 tf->tf_x[2] = 0; 351 } 352 tf->tf_x[29] = (register_t)&fp->fp; 353 tf->tf_elr = (register_t)catcher; 354 tf->tf_sp = (register_t)fp; 355 tf->tf_lr = (register_t)__user_rt_sigreturn; 356 357 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_elr, 358 tf->tf_sp); 359 360 PROC_LOCK(p); 361 mtx_lock(&psp->ps_mtx); 362 } 363 364 struct sysentvec elf_linux_sysvec = { 365 .sv_size = LINUX_SYS_MAXSYSCALL, 366 .sv_table = linux_sysent, 367 .sv_fixup = __elfN(freebsd_fixup), 368 .sv_sendsig = linux_rt_sendsig, 369 .sv_sigcode = &_binary_linux_vdso_so_o_start, 370 .sv_szsigcode = &linux_szsigcode, 371 .sv_name = "Linux ELF64", 372 .sv_coredump = elf64_coredump, 373 .sv_elf_core_osabi = ELFOSABI_NONE, 374 .sv_elf_core_abi_vendor = LINUX_ABI_VENDOR, 375 .sv_elf_core_prepare_notes = linux64_prepare_notes, 376 .sv_minsigstksz = LINUX_MINSIGSTKSZ, 377 .sv_minuser = VM_MIN_ADDRESS, 378 .sv_maxuser = VM_MAXUSER_ADDRESS, 379 .sv_usrstack = LINUX_USRSTACK, 380 .sv_psstrings = LINUX_PS_STRINGS, 381 .sv_psstringssz = sizeof(struct ps_strings), 382 .sv_stackprot = VM_PROT_READ | VM_PROT_WRITE, 383 .sv_copyout_auxargs = __linuxN(copyout_auxargs), 384 .sv_copyout_strings = __linuxN(copyout_strings), 385 .sv_setregs = linux_exec_setregs, 386 .sv_fixlimit = NULL, 387 .sv_maxssiz = NULL, 388 .sv_flags = SV_ABI_LINUX | SV_LP64 | SV_SHP | SV_SIG_DISCIGN | 389 SV_SIG_WAITNDQ | SV_TIMEKEEP, 390 .sv_set_syscall_retval = linux_set_syscall_retval, 391 .sv_fetch_syscall_args = linux_fetch_syscall_args, 392 .sv_syscallnames = linux_syscallnames, 393 .sv_shared_page_base = LINUX_SHAREDPAGE, 394 .sv_shared_page_len = PAGE_SIZE, 395 .sv_schedtail = linux_schedtail, 396 .sv_thread_detach = linux_thread_detach, 397 .sv_trap = NULL, 398 .sv_hwcap = &elf_hwcap, 399 .sv_hwcap2 = &elf_hwcap2, 400 .sv_onexec = linux_on_exec_vmspace, 401 .sv_onexit = linux_on_exit, 402 .sv_ontdexit = linux_thread_dtor, 403 .sv_setid_allowed = &linux_setid_allowed_query, 404 }; 405 406 static int 407 linux_on_exec_vmspace(struct proc *p, struct image_params *imgp) 408 { 409 int error; 410 411 error = linux_map_vdso(p, linux_vdso_obj, linux_vdso_base, 412 LINUX_VDSOPAGE_SIZE, imgp); 413 if (error == 0) 414 error = linux_on_exec(p, imgp); 415 return (error); 416 } 417 418 /* 419 * linux_vdso_install() and linux_exec_sysvec_init() must be called 420 * after exec_sysvec_init() which is SI_SUB_EXEC (SI_ORDER_ANY). 421 */ 422 static void 423 linux_exec_sysvec_init(void *param) 424 { 425 l_uintptr_t *ktimekeep_base; 426 struct sysentvec *sv; 427 ptrdiff_t tkoff; 428 429 sv = param; 430 /* Fill timekeep_base */ 431 exec_sysvec_init(sv); 432 433 tkoff = kern_timekeep_base - linux_vdso_base; 434 ktimekeep_base = (l_uintptr_t *)(linux_vdso_mapping + tkoff); 435 *ktimekeep_base = sv->sv_shared_page_base + sv->sv_timekeep_offset; 436 } 437 SYSINIT(elf_linux_exec_sysvec_init, SI_SUB_EXEC + 1, SI_ORDER_ANY, 438 linux_exec_sysvec_init, &elf_linux_sysvec); 439 440 static void 441 linux_vdso_install(const void *param) 442 { 443 char *vdso_start = &_binary_linux_vdso_so_o_start; 444 char *vdso_end = &_binary_linux_vdso_so_o_end; 445 446 linux_szsigcode = vdso_end - vdso_start; 447 MPASS(linux_szsigcode <= LINUX_VDSOPAGE_SIZE); 448 449 linux_vdso_base = LINUX_VDSOPAGE; 450 451 __elfN(linux_vdso_fixup)(vdso_start, linux_vdso_base); 452 453 linux_vdso_obj = __elfN(linux_shared_page_init) 454 (&linux_vdso_mapping, LINUX_VDSOPAGE_SIZE); 455 bcopy(vdso_start, linux_vdso_mapping, linux_szsigcode); 456 457 linux_vdso_reloc(linux_vdso_mapping, linux_vdso_base); 458 } 459 SYSINIT(elf_linux_vdso_init, SI_SUB_EXEC + 1, SI_ORDER_FIRST, 460 linux_vdso_install, NULL); 461 462 static void 463 linux_vdso_deinstall(const void *param) 464 { 465 466 __elfN(linux_shared_page_fini)(linux_vdso_obj, 467 linux_vdso_mapping, LINUX_VDSOPAGE_SIZE); 468 } 469 SYSUNINIT(elf_linux_vdso_uninit, SI_SUB_EXEC, SI_ORDER_FIRST, 470 linux_vdso_deinstall, NULL); 471 472 static void 473 linux_vdso_reloc(char *mapping, Elf_Addr offset) 474 { 475 Elf_Size rtype, symidx; 476 const Elf_Rela *rela; 477 const Elf_Shdr *shdr; 478 const Elf_Ehdr *ehdr; 479 Elf_Addr *where; 480 Elf_Addr addr, addend; 481 int i, relacnt; 482 483 MPASS(offset != 0); 484 485 relacnt = 0; 486 ehdr = (const Elf_Ehdr *)mapping; 487 shdr = (const Elf_Shdr *)(mapping + ehdr->e_shoff); 488 for (i = 0; i < ehdr->e_shnum; i++) 489 { 490 switch (shdr[i].sh_type) { 491 case SHT_REL: 492 printf("Linux Aarch64 vDSO: unexpected Rel section\n"); 493 break; 494 case SHT_RELA: 495 rela = (const Elf_Rela *)(mapping + shdr[i].sh_offset); 496 relacnt = shdr[i].sh_size / sizeof(*rela); 497 } 498 } 499 500 for (i = 0; i < relacnt; i++, rela++) { 501 where = (Elf_Addr *)(mapping + rela->r_offset); 502 addend = rela->r_addend; 503 rtype = ELF_R_TYPE(rela->r_info); 504 symidx = ELF_R_SYM(rela->r_info); 505 506 switch (rtype) { 507 case R_AARCH64_NONE: /* none */ 508 break; 509 510 case R_AARCH64_RELATIVE: /* B + A */ 511 addr = (Elf_Addr)(mapping + addend); 512 if (*where != addr) 513 *where = addr; 514 break; 515 default: 516 printf("Linux Aarch64 vDSO: unexpected relocation type %ld, " 517 "symbol index %ld\n", rtype, symidx); 518 } 519 } 520 } 521 522 static Elf_Brandnote linux64_brandnote = { 523 .hdr.n_namesz = sizeof(GNU_ABI_VENDOR), 524 .hdr.n_descsz = 16, 525 .hdr.n_type = 1, 526 .vendor = GNU_ABI_VENDOR, 527 .flags = BN_TRANSLATE_OSREL, 528 .trans_osrel = linux_trans_osrel 529 }; 530 531 static Elf64_Brandinfo linux_glibc2brand = { 532 .brand = ELFOSABI_LINUX, 533 .machine = EM_AARCH64, 534 .compat_3_brand = "Linux", 535 .interp_path = "/lib64/ld-linux-x86-64.so.2", 536 .sysvec = &elf_linux_sysvec, 537 .interp_newpath = NULL, 538 .brand_note = &linux64_brandnote, 539 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 540 }; 541 542 Elf64_Brandinfo *linux_brandlist[] = { 543 &linux_glibc2brand, 544 NULL 545 }; 546 547 static int 548 linux64_elf_modevent(module_t mod, int type, void *data) 549 { 550 Elf64_Brandinfo **brandinfo; 551 struct linux_ioctl_handler**lihp; 552 int error; 553 554 error = 0; 555 switch(type) { 556 case MOD_LOAD: 557 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; 558 ++brandinfo) 559 if (elf64_insert_brand_entry(*brandinfo) < 0) 560 error = EINVAL; 561 if (error == 0) { 562 SET_FOREACH(lihp, linux_ioctl_handler_set) 563 linux_ioctl_register_handler(*lihp); 564 stclohz = (stathz ? stathz : hz); 565 if (bootverbose) 566 printf("Linux arm64 ELF exec handler installed\n"); 567 } 568 break; 569 case MOD_UNLOAD: 570 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; 571 ++brandinfo) 572 if (elf64_brand_inuse(*brandinfo)) 573 error = EBUSY; 574 if (error == 0) { 575 for (brandinfo = &linux_brandlist[0]; 576 *brandinfo != NULL; ++brandinfo) 577 if (elf64_remove_brand_entry(*brandinfo) < 0) 578 error = EINVAL; 579 } 580 if (error == 0) { 581 SET_FOREACH(lihp, linux_ioctl_handler_set) 582 linux_ioctl_unregister_handler(*lihp); 583 if (bootverbose) 584 printf("Linux arm64 ELF exec handler removed\n"); 585 } else 586 printf("Could not deinstall Linux arm64 ELF interpreter entry\n"); 587 break; 588 default: 589 return (EOPNOTSUPP); 590 } 591 return (error); 592 } 593 594 static moduledata_t linux64_elf_mod = { 595 "linux64elf", 596 linux64_elf_modevent, 597 0 598 }; 599 600 DECLARE_MODULE_TIED(linux64elf, linux64_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY); 601 MODULE_DEPEND(linux64elf, linux_common, 1, 1, 1); 602 FEATURE(linux64, "AArch64 Linux 64bit support"); 603